发明名称 |
Leak test method and leak test apparatus |
摘要 |
A leak test method includes: reducing first pressure in an inspection space in a work and second pressure in a space in a master chamber; humidifying the inspection space in the work; and detecting a change in differential pressure between the inspection space in the work and the space in the master chamber, while the inspection space in the work is in a water-vapor saturated state. Also, in this leak test method, a leak in the inspection space in the work is detected from the change in the differential pressure. |
申请公布号 |
US9404828(B2) |
申请公布日期 |
2016.08.02 |
申请号 |
US201214353406 |
申请日期 |
2012.10.22 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
Yamaguchi Tetsuya |
分类号 |
G01M3/02;G01L19/00;G01M3/34;G01M3/32 |
主分类号 |
G01M3/02 |
代理机构 |
Oblon, McClelland, Maier & Neustadt, L.L.P |
代理人 |
Oblon, McClelland, Maier & Neustadt, L.L.P |
主权项 |
1. A leak test method comprising:
reducing first pressure in an inspection space in a work and second pressure in a space in a master chamber; humidifying the inspection space in the work; and detecting a change in differential pressure between the inspection space in the work and the space in the master chamber, while the inspection space in the work is in a water-vapor saturated state, wherein a leak in the inspection space in the work is detected from the change in the differential pressure. |
地址 |
Toyota-shi JP |